冷凝器流程布置的数值模拟研究（2）：计算结果与分析
Numerical simulation of refrigerant flow arrangement in condensers (2): numerical simulation results and analysis
摘要：
运用分布参数模型对2～4排管冷凝器的流程布置方式进行了模拟计算，并对其换热和流动特性进行了分析和研究。研究结果表明，单回路冷凝器中，逆流布置换热效果最好，叉流其次，顺流最差；多排管冷凝器应尽可能采用分流方式，以减小压降，增强换热；布置冷凝器流程时，重力的影响不可忽略；当风量不变时，必然存在一最佳制冷剂流量使冷凝器性能达到最佳；当制冷剂流量保持不变时，也相应存在一个最佳风量使冷凝器性能最佳。
Abstract：
Based on the ε-NTU method, numerically simulates the refrigerant circuitry of the condensers with 2 to 4 rows of tubing and analyses the characteristics of the heat transfer and flow. The research results show that the counter-flow condensers have a better performance than that of other arrangements in single-circuit condensers, and that branch flow should be adopted in multi-rows condensers to decrease the pressure drop and increase the heat transfer capacity, and that the influence of gravity force can not be ignored, and that there must be an optimum refrigerant mass flow which can make the condenser perform best when the air velocity is constant while there must be an optimum air flow which can make the condenser perform best when the refrigerant mass flow is constant.
Keywords:condenser, flow arrangement, numerical simulation